109 / EN
Service
Error list
The errors are displayed on the interface in the indoor unit (see paragraph "System interface REMOCON PLUS 2").
Indoor unit errors
Code Description Resolution
114 Outside temperature not available Temperature control activation based on the external sensor
External sensor not connected or damaged. Check the sensor’s connection
and replace it, if necessary.
730 Buffer high probe error Buffer filling inhibited. Check the hydraulic diagram.
Buffer sensor not connected or damaged. Check the sensor’s connection
and replace it, if necessary.
731 Buffer overtemperature Buffer filling inhibited. Check the hydraulic diagram.
Buffer sensor not connected or damaged. Check the sensor’s connection
and replace it, if necessary.
732 Buffer low probe error Buffer filling inhibited. Check the hydraulic diagram.
Buffer sensor not connected or damaged. Check the sensor’s connection
and replace it, if necessary.
902 System flow sensor damaged Delivery sensor not connected or defective. Check the sensor’s connection
and replace it, if necessary.
923 Heating circuit pressure error Check for any water leakages in the hydraulic circuit
Faulty pressure switch
Defective cabling of the pressure switch. Check the connection of the pres-
sure switch and replace it, if necessary.
924 HP communication error Check the cabling between the TDM board and the Energy Manager
927 AUX inputs correspondence error Verify the configuration of parameters 1.1.3 and 1.1.4
928 Energy supply shutdown configura-
tion error
Check the configuration of parameter 1.1.5
933 Flow sensor overtemperature Check the flow in the primary circuit. Delivery sensor not connected or
defective. Check the sensor’s connection and replace it, if necessary.
934 DHW tank sensor damaged Calorifier sensor not connected or defective. Check the sensor’s connection
and replace it, if necessary.
935 Tank overtemperature Check whether the 3-way valve is locked in the DHW position. Check the
connection of the calorifier’s sensor and replace it, if necessary.
936 Floor thermostat 1 error Check the flow of the under-floor system. Check the connection of the
thermostat on the IN-AUX2 STE terminal of the Energy Manager and/or
STT of the TDM. If the thermostat of the under-floor system is not present,
apply an electrical jumper to terminal IN-AUX2 STE of the Energy Manager
and/or STT of the TDM.
937 No circulation error Check that the main circuit has activated
938 Anode fault Check the connection of the anode
Check whether there is any water in the indirect cylinder
Check the condition of the anode
Check the configuration of parameter 1.2.6
940 Hydraulic scheme not defined Hydraulic diagram not selected through parameter 1.1.0
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